氨
堆肥
氮气
肥料
尿素氨挥发
化学
环境污染
环境化学
污染
环境科学
废物管理
环境工程
制浆造纸工业
环境保护
有机化学
生态学
工程类
生物
作者
Shunxi Zhou,Peiyin Jia,Wanying Xu,Shaif-ul Alam,Zengqiang Zhang
标识
DOI:10.1016/j.biortech.2023.129455
摘要
Ammonia emissions not only lead to environmental pollution but also reduce the quality of compost products. Here, a novel composting system (condensation return composting system, CRCS) was designed for mitigating ammonia emissions. The results showed that the CRCS reduced ammonia emissions by 59.3% and increased the total nitrogen content by 19.4% compared with the control. By integrating the results of nitrogen fraction conversion, ammonia-assimilating enzyme activity, and structural equation modeling, it was found that the CRCS facilitated the conversion of ammonia to organic nitrogen by stimulating ammonia-assimilating enzyme activity and ultimately retained nitrogen in the compost product. Moreover, the pot experiment confirmed that nitrogen-rich organic fertilizer produced by the CRCS significantly increased the fresh weight (45.0%), root length (49.2%), and chlorophyll content (11.7%) of pakchoi. This study provides a promising strategy for mitigating ammonia emissions and producing nitrogen-rich organic fertilizer with high agronomic value.
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